Scottish gas how is this possible

Can anyone please explain or maybe offer some advice as to how to handle this situation

let me first explain,



three years ago I split up with my now ex wife she remained in my house for a further two years

then a year and three months ago after loosing another court battle she moved out



all the water and power was turned off in the house except one light bulb for about three weeks it two was then turned off

I gave the meter readings to the energy suppliers



then every three months despite telling them the property was empty and nothing was on they kept sending estimated bills after sending readings again they kept sending more estimated bills and as I don't live there and the property is empty and will remain as such until my ex pays for the damage she has done to it but that's another story,



but today mail came to my new house from Buchanan Clarke and Wells asking me to contact them giving a reference number having read they are a depth collection agency I don't understand why they are contacting me when the energy company can't update there records if it is that and what can I do as this firm appear to be idiots

Scottish gas how is this possible